more piano tuning questions (re: JI, Johnston)

Hello everyone-
In view of the recent discussion of piano tuning, I thought I might elicit some
feedback on
the (admittedly controversial) idea of just piano tunings-
Does anyone has any observations from experience on just piano tunings, in
particular Ben
Johnston's pieces which use piano? I heard a live performance of the "Suite for
microtonal piano" at last year's Microfest, and it struck me as very effective -
ratios of 7 & 11 seemed quite well characterised & consonant. How does this
relate to or interact with the inharmonic aspects of the piano, and to what
degree can a just tuning be satisfactorily realised on piano?
I guess I was pretty convinced by the Johnston piece that it can be effective,
but I still hesitate to compose for just piano myself (I don't have an
instrument to experiment on myself at the moment). Can I just assume that at
least a passable impression of just will be created,
despite octave stretching, or are there other factors to consider? Etc. etc.
etc.
 
Any feedback will be appreciated...
Thanks
Chris

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Just tunings can be represented fairly well on the piano. Listen to
LaMonte Young's _The Well-Tuned Piano_. You'll want to use the usual
stretching curves, after which, the smaller intervals (those not
exceeding a fifth or octave) will behave pretty much as they do in JI
(some beating will be inevitable, though).